Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1976__148_172371, author = {Peter Volkmann and Helmut Kroh}, title = {St\"orungss\"atze f\"ur {Semifredholmoperatoren.}}, journal = {Mathematische Zeitschrift}, pages = {295--298}, publisher = {mathdoc}, volume = {148}, year = {1976}, zbl = {0318.47008}, url = {http://geodesic.mathdoc.fr/item/MZ_1976__148_172371/} }
Peter Volkmann; Helmut Kroh. Störungssätze für Semifredholmoperatoren.. Mathematische Zeitschrift, Tome 148 (1976), pp. 295-298. http://geodesic.mathdoc.fr/item/MZ_1976__148_172371/